Exposure value

Exposure value is like the amount of light that your camera uses to take a picture, kind of like how much light your eyes need to see. Imagine you're in a room and it's really bright outside. If you want to see things clearly, you might squint or close the blinds so less light comes in. On the other hand, if it's really dark inside, you might turn on a lamp or open the curtains to let more light in so you can see better.

Your camera works in a similar way. It needs to have the right amount of light to take a good picture. Exposure value is a way to measure how much light is coming into your camera. If there's too much light, your picture will look really bright and washed out. If there's not enough light, your picture will be dark and hard to see.

Exposure value is usually determined by three things: the aperture, the shutter speed, and the ISO. The aperture is like the size of the hole in the camera lens that lets light in. The shutter speed is how long the camera lens is open for, or how long the image is 'exposed' to light. The ISO is like how sensitive your camera is to light – a higher ISO number means your camera is more sensitive to light.

When your camera gets the right exposure, your picture will look clear, bright, and easy to see. It's kind of like having the perfect amount of light in your room – not too bright and not too dark.